A wiring system for ground mounted lighting fixtures comprises a base of the lighting fixture that is located on top of the ground surface. The above-ground base includes a wiring box and construction of the base resists sprinkler water and rain from entering the wiring box. A connector device is mounted in the wiring box and has multiple ports for interconnecting the wires of the incoming power cable with wires of the outgoing power cable and interconnecting those wires with the wires of the power cable of the light source in the fixture. The connector device includes an internal circuit that provides a parallel connection of the light source cable with the incoming and outgoing power cables. Spring lever clamps are used to secure the various wires in the connector device ports and in connection with the internal circuit. The wiring box is thus integral with the light fixture.